src/main/scala/devices/i2c/I2CPins.scala

   1 // See LICENSE for license details.
   2 package sifive.blocks.devices.i2c
   3
   4 import Chisel._
   5 import chisel3.experimental.{withClockAndReset}
   6 import sifive.blocks.devices.pinctrl.{Pin, PinCtrl}
   7 import sifive.blocks.util.ShiftRegisterInit
   8
   9
  10 class I2CPins[T <: Pin](pingen: () => T) extends Bundle {
  11
  12   val scl: T = pingen()
  13   val sda: T = pingen()
  14
  15   override def cloneType: this.type =
  16     this.getClass.getConstructors.head.newInstance(pingen).asInstanceOf[this.type]
  17
  18   def fromPort(i2c: I2CPort, clock: Clock, reset: Bool, syncStages: Int = 0) = {
  19     withClockAndReset(clock, reset) {
  20       scl.outputPin(i2c.scl.out, pue=true.B, ie = true.B)
  21       scl.o.oe := i2c.scl.oe
  22       i2c.scl.in := ShiftRegisterInit(scl.i.ival, syncStages, Bool(true))
  23
  24       sda.outputPin(i2c.sda.out, pue=true.B, ie = true.B)
  25       sda.o.oe := i2c.sda.oe
  26       i2c.sda.in := ShiftRegisterInit(sda.i.ival, syncStages, Bool(true))
  27     }
  28   }
  29 }